U.S. patent application number 13/908168 was filed with the patent office on 2014-05-08 for electric bed front motor drive structure.
The applicant listed for this patent is HUAFENG SHAN. Invention is credited to HUAFENG SHAN.
Application Number | 20140123391 13/908168 |
Document ID | / |
Family ID | 50620989 |
Filed Date | 2014-05-08 |
United States Patent
Application |
20140123391 |
Kind Code |
A1 |
SHAN; HUAFENG |
May 8, 2014 |
ELECTRIC BED FRONT MOTOR DRIVE STRUCTURE
Abstract
The invention discloses an electric bed front motor drive
structure. The structure of the drive head back bed board is
connected to the fixed bed board. The top frame is set beneath the
fixed bed board. the upper and lower frame are connected by guiding
mechanism and rail movements. The bottom bedframe has intermediate
connecting rods. The intermediate connecting rod has a first
bracket. The rotation of the motor bracket lever is hinged at one
end of the upper frame between the two side rods. Two connecting
rods is set on the rotating rod. Second bracket is located
underneath the motor bracket lever. The linear bearing assembly's
bottom edge, two sides and two bases are located at the head back
portion of the bed board underside. The two linear bearing
assemblies connect the bottom edge and two bases.
Inventors: |
SHAN; HUAFENG; (Jiaxing
City, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
SHAN; HUAFENG |
Jiaxing City |
|
CN |
|
|
Family ID: |
50620989 |
Appl. No.: |
13/908168 |
Filed: |
June 3, 2013 |
Current U.S.
Class: |
5/616 |
Current CPC
Class: |
A61G 2203/42 20130101;
A47C 20/041 20130101; A61G 7/012 20130101; A61G 7/015 20130101;
A61G 7/018 20130101; A61G 7/002 20130101 |
Class at
Publication: |
5/616 |
International
Class: |
A61G 7/015 20060101
A61G007/015 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 6, 2012 |
CN |
201210437918.3 |
Nov 6, 2012 |
CN |
201220579701.1 |
Claims
1. An electric bed front motor drive structure comprising: a. head
back bedboard in hinged connection to a middle bedboard, wherein
the middle bedboard is attached to and supported by an upper frame,
wherein the upper frame is attached to and supported by a lower
frame, wherein the head back bedboard is configured to hinge upward
for raising a head of a user; b. wherein the lower frame has a pair
of connecting rods extending toward the head back bedboard; c. a
linear bearing assembly having edge members attached to linear
bearings, wherein the linear bearing assembly is attached to the
head back bedboard, wherein the linear bearing assembly is hinged
to the pair of connecting rods in a sliding configuration; d. a
front motor mounted to the lower frame at a first end of the front
motor, and hinge mounted to a front motor frame at a second end of
the front motor, wherein the front motor is configured to push up
the head back bedboard when the front motor has a drive rod that
extends to travel from a retracted position to an extended
position, wherein during front motor operation, the head back
bedboard has supplemental support from the pair of connecting
rods.
2. The electric bed front motor drive structure of claim 1, wherein
the upper frame further comprises two sidebars that have horizontal
rods to support the two sidebars, wherein the two sidebars
terminate at guiding mechanisms, wherein a total of four diving
mechanisms are provided on ends of the two sidebars.
3. The electric bed front motor drive structure of claim 1, wherein
the lower frame includes a rectangular frame formed as a periphery
of the lower frame, wherein the rectangular frame has an
intermediate connecting rod extending horizontally across the
rectangular frame, wherein the rectangular frame further includes
four short guide rails mounted horizontally on the rectangular
frame, wherein the rectangular frame further includes a first
bracket for mounting to the front motor first end.
4. The electric bed front motor drive structure of claim 1, wherein
the front motor frame further includes a second bracket receiving
the second end of the front motor, wherein the front motor frame
further includes a second bracket mounted to a rotating lever that
is swivel mounted to the front motor frame.
5. The electric bed front motor drive structure of claim 4, wherein
the two connecting rods are welded to the rotating lever.
6. The electric bed front motor drive structure of claim 1, wherein
the edge member attached to linear bearings further comprise a
bottom edge member having a bottom edge member first end and a
bottom edge member second end; and wherein the edge member attached
to linear bearings further comprise two side edge members, namely a
first edge side member and a second edge side member, wherein the
first edge side member is connected to the bottom edge member first
end and, wherein the second edge side member is connected to the
bottom edge member second end.
7. The electric bed front motor drive structure of claim 1, further
comprising two bottom base stands formed on the linear bearing
assembly to support the linear bearings.
8. The electric bed front motor drive structure of claim 7, wherein
the upper frame further comprises two sidebars that have horizontal
rods to support the two sidebars, wherein the two sidebars
terminate at guiding mechanisms, wherein a total of four diving
mechanisms are provided on ends of the two sidebars.
9. The electric bed front motor drive structure of claim 7, wherein
the lower frame includes a rectangular frame formed as a periphery
of the lower frame, wherein the rectangular frame has an
intermediate connecting rod extending horizontally across the
rectangular frame, wherein the rectangular frame further includes
four short guide rails mounted horizontally on the rectangular
frame, wherein the rectangular frame further includes a first
bracket for mounting to the front motor first end.
10. The electric bed front motor drive structure of claim 7,
wherein the front motor frame further includes a second bracket
receiving the second end of the front motor, wherein the front
motor frame further includes a second bracket mounted to a rotating
lever that is swivel mounted to the front motor frame.
11. The electric bed front motor drive structure of claim 10,
wherein the two connecting rods are welded to the rotating
lever.
12. The electric bed front motor drive structure of claim 7,
wherein the edge member attached to linear bearings further
comprise a bottom edge member having a bottom edge member first end
and a bottom edge member second end; and wherein the edge member
attached to linear bearings further comprise two side edge members,
namely a first edge side member and a second edge side member,
wherein the first edge side member is connected to the bottom edge
member first end and, wherein the second edge side member is
connected to the bottom edge member second end.
Description
[0001] This application is being filed within 12 months of the
filing date of its parent application and accordingly claims Paris
Convention priority from China patent applications 201220579701.1
and 201210437918.3 both filed Nov. 6, 2012 and both entitled
Electric Bed Front Motor Drive Structure by same inventor Shan,
Huafeng, the disclosure of which is incorporated herein by
reference.
FIELD OF THE INVENTION
[0002] The invention relates to an electric bed front motor drive
structure.
DISCUSSION OF RELATED ART
[0003] With increasing diet and lack of physical exercise,
motorized electric beds are becoming more popular in America. The
traditional electric bed has a bedboard made of multiple pieces of
hinged bedboard such as the headback bedboard, the fixed bedplate,
and the leg bedboard and foot bed board. The bedboard has a bottom
framework connected to the lower frame and the upper frame. Setting
the front and rear motor drives the bedpanels to achieve lift and
meet body posture needs. A front bedboard motor drives the
movements for supporting the back of the head. The front motor base
is hinged on the connecting tube in the middle of the lower frame.
The front motor drive rod directly articulates a bracket on an
underside of the bed board at the back of the head, bracket and
head back bed board screw connection.
[0004] The traditional connection structure has some flaws
especially when dealing with super obese users. Because the
bedboard is mostly wood material having softer characteristics than
metal, the bedplate lifting force of the drive rod points are
initially highly concentrated in the bed board and the bracket
screws are easy to dislodge and bed board damage may occur, which
affects the service life of the electric bed. Another traditional
electric bed flaw is because of space limitations. The front motor
drive head backboard has a shorter lever arm, and its carrying of
the motor load makes it easy to damage and also overload the front
motor. If using a larger load motor, the production costs of the
electric bed are increased as some larger load motors are not
mass-produced.
[0005] For example, the high initial stress concentration on the
wood board to metal bracket connection is seen in Clenet U.S. Pat.
No. 7,930,780, issued Apr. 26, 2011 for an Adjustable Bed Frame
Assembly and also Hensley United States publication 20010000828
published on May 10, 2001 also for an adjustable bed for an
assembly, the disclosures of which are incorporated herein by
reference. High initial stress concentration during initial rising
from the prone position to the raised position could lead to
pulling out of screws, overloading of a motor, or jerky movement
for a user on the bed. Electric beds typically have a backboard
supporting a head and back, also called a head backboard or a head
supporting backboard. The backboard is hinged to a generally
horizontal seat section that is also called a seat board. The seat
board is hinged to a thigh board that supports the thighs and the
thighboard is hinged to a calf board that supports the calves. The
calf board could also be called a footboard since it also supports
the feet.
SUMMARY OF THE INVENTION
[0006] The present invention aims to solve the above mentioned
technical problems to provide an electric bed front motor structure
that has improved driving structure, to overcome the traditional
electric motor connection structure defects, to avoid damage to the
headback bedboard and the front motor, improve electric bed life,
and reduce the production costs of the electric bed. In order to
solve the above technical problems, the present invention electric
bed front motor drive structure includes: a hinge between the back
of the head bedboard and the fixed bedboard; the upper frame; lower
frame; and the front motor with the drive rod. The upper frame
comprises: two side bar; two rails; and four guiding mechanisms.
The two side bars are arranged parallel at an interval with two
ends bent down.
[0007] The two horizontal bars are parallel with each other and
also set in between two sidebars. As described, four guide
mechanisms are between two sides of the two sidebars. Two
horizontal bars are set in the bottom of the fixed bed board. The
above upper frame has one end extending to the head back portion 1
bottom. The lower frame includes a rectangular frame, the
intermediate connecting rod, and the first bracket and four short
rails. The intermediate connecting rod is set inside the
rectangular frame. The first bracket is set above the intermediate
connecting rod. The four short rail set inside two sides of the
rectangular frame. The upper frame has four guide mechanism located
within the four short rail of the lower frame. The drive structure
further comprises a front motor bracket and the linear bearing
assembly.
[0008] The motor bracket includes a rotating lever, and two
connecting rods and of the second bracket. Rotation of the
horizontal lever is hinged to the upper frame at one end of the two
sides of the lever between the two connecting rods vertically
spaced and disposed on the rotating lever. The second bracket is
provided in the bottom surface of the rotating lever.
[0009] The linear bearing assembly includes a bottom edge, two side
edges, two linear bearings and two bases. The two side edges are
separately situated upon two sides of the bottom edge. The two
linear bearings has at one end spaced vertically from located at
the bottom edge. The two bases are located at the other end of the
two linear bearings. The bottom edge, two sides of the bottom edge
of the base and two bases are located at the back of the head
bottom surface of the bedplate. The front motor bracket has two
connecting rods hinged to the two linear bearings.
[0010] The motor is mounted to the lower frame intermediate
connecting rod at a bracket, the front of the motor drive has
hinged attachment to the rotating lever at a second bracket that is
welded to the rotating lever.
[0011] The front motor bracket has second bracket which is a curved
bracket that is curved toward the front motor direction. On the
upper frame, the four guide mechanism is a guide wheel or guide
slider. The upper frame two crossbars are secured by means of
screws located at the fixed bedboard bottom surface. The bottom
edge of the linear bearing assembly, the two side edges and the
base are connected by screws, respectively provided in a bottom
surface of the head back bedboard. The front motor rotating lever
of the bracket has a sectional view that is rectangular. A
rectangular cross-section of the rotating lever has a good rigidity
and improves the torsional properties of the rotating lever to
avoid the deformation or distortion of the rotating lever.
[0012] The electric bed motor driven structure has a drive
structure in the headback bedboard hinged to a fixed bed board. The
upper frame is located on the underside of the fixed bed board. The
lower frame and the upper frame are connected by guiding mechanisms
and rail movements to the lower frame and has an intermediate
connecting rod. The intermediate connecting rod is welded to first
bracket. The front motor bracket rotating lever is hinged at one
end of the upper frame between the two side rods. Two connecting
rods at a vertical interval are provided on the rotating lever on
the second bracket in the bottom surface of the rotating rod. The
linear bearing assembly bottom edge has two sides and two bases
located at the headback bed board underside. The two linear bearing
assemblies connect the bottom edge and two bases. The front motor
bracket has two connecting rods which connect to two linear bearing
assemblies. The front motor and the first bracket are connected.
The drive lever of the front motor and the second hinge bracket are
connected. This drive structure aims to overcome the shortcomings
of the traditional electric bed front motor connection structure by
decreasing stress and strain on the headback bedboard and the front
motor.
Short Summary of the Invention
[0013] The invention discloses an electric bed front motor drive
structure. The structure of the drive head back bed board is
connected to the fixed bed board. The top frame is set beneath the
fixed bed board. the upper and lower frame are connected by guiding
mechanism and rail movements. The bottom bedframe has intermediate
connecting rods. The intermediate connecting rod has a first
bracket. The rotation of the motor bracket lever is hinged at one
end of the upper frame between the two side rods. Two connecting
rods is set on the rotating rod. Second bracket is located
underneath the motor bracket lever. The linear bearing assembly's
bottom edge, two sides and two bases are located at the head back
portion of the bed board underside. The two linear bearing
assemblies connect the bottom edge and two bases. The front motor
bracket has two connecting rods which connect to two linear bearing
assemblies. The front motor and the first bracket are connected.
The drive lever of the front motor and the second hinge bracket are
connected. This drive structure overcomes the shortcomings of the
traditional electric bed front motor connection structure. It
avoids damage to the head back portion of the bed board and the
front motor, thus improving the life of the electric bed to reduce
the production costs of electric bed.
Summary of the Claims
[0014] An electric bed front motor drive structure has a head back
bedboard in hinged connection to a middle bedboard. The middle
bedboard is attached to and supported by an upper frame. The upper
frame is attached to and supported by a lower frame. The head back
bedboard is configured to hinge upward for raising a head of a
user. The lower frame has a pair of connecting rods extending
toward the head back bedboard. A linear bearing assembly has edge
members attached to linear bearings, and the linear bearing
assembly is attached to the head back bedboard. The linear bearing
assembly is hinged to the pair of connecting rods in a sliding
configuration. A front motor is mounted to the lower frame at a
first end of the front motor, and hinge mounted to a front motor
frame at a second end of the front motor. The front motor is
configured to push up the head back bedboard when the front motor
has a drive rod that extends to travel from a retracted position to
an extended position. During front motor operation, the head back
bedboard has supplemental support from the pair of connecting
rods.
[0015] The upper frame has two sidebars that have horizontal rods
to support the two sidebars. The two sidebars terminate at guiding
mechanisms. A total of four diving mechanisms are provided on ends
of the two sidebars. The lower frame includes a rectangular frame
formed as a periphery of the lower frame. The rectangular frame has
an intermediate connecting rod extending horizontally across the
rectangular frame. The rectangular frame further includes four
short guide rails mounted horizontally on the rectangular frame.
The rectangular frame further includes a first bracket for mounting
to the front motor first end. The front motor frame further
includes a second bracket receiving the second end of the front
motor. The front motor frame further includes a second bracket
mounted to a rotating lever that is swivel mounted to the front
motor frame.
[0016] The two connecting rods are welded to the rotating lever.
The edge member is attached to linear bearings and additionally
optionally includes a bottom edge member having a bottom edge
member first end and a bottom edge member second end. The edge
member is preferably attached to linear bearings and may also have
two side edge members, namely a first edge side member and a second
edge side member. The first edge side member is connected to the
bottom edge member first end. The second edge side member is
connected to the bottom edge member second end. Two bottom base
stands are formed on the linear bearing assembly to support the
linear bearings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The embodiments of the invention are presented further below
in conjunction with the accompanying drawings and the detailed
description:
[0018] FIG. 1 is a bottom perspective view schematic structural
diagram of the front motor driven electric bed.
[0019] FIG. 2 is a bottom perspective view of the drive structure
on the frame and the motor bracket front connection diagram.
[0020] FIG. 3 is a bottom perspective view of the motor drive
structure and the lower frame and the motor bracket front
connection diagram.
[0021] FIG. 4 is a top perspective view of a schematic structural
diagram of the linear bearing assembly drive structure.
[0022] The following call out list of elements can be a useful
guide in referencing the element numbers of the drawings. [0023] 1
Headback Bedboard [0024] 2 Middle Bedboard [0025] 3 Upper Frame
[0026] 31 Two Side Bars [0027] 32 Horizontal Rods [0028] 33 Four
Guiding Mechanism [0029] 4 Lower Frame [0030] 41 Rectangular Frame
[0031] 42 Intermediate Connecting Rod [0032] 43 Four Short Guide
Rail [0033] 44 First Bracket [0034] 5 Front Motor [0035] 51 Drive
Rod [0036] 6 Front Motor Frame [0037] 61 Rotating Lever [0038] 62
Two Connecting Rods [0039] 63 Second Bracket [0040] 7 Linear
Bearing Assembly [0041] 71 Bottom Edge Member [0042] 72 Two Side
Edge Members [0043] 73 Two Linear Bearings [0044] 74 Two Bottom
Base Stands
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0045] As shown in FIGS. 1 to 4, the front motor driving structure
of the present invention electric bed comprises: a middle bedboard
2 that is fixed to the upper frame and hinged to a headback
bedboard 1; a front motor 5; an upper frame 3, a lower frame 4, and
a drive rod 51 of the front motor 5. The user sits on the middle
fixed bedboard 2 and in the middle fixed bed board 2 can be called
a seat board. The user head and back are supported by the headback
bedboard 1.
[0046] The upper frame 3 comprises two side bars 31, two horizontal
bars 32 and four guiding mechanism 33. The two side bars 31 are
arranged parallel at an interval with two ends bent down. The two
horizontal bars 32 are parallel with each other and also set in
between two sidebars 31. As described, four guide mechanisms 33 are
between two sides of the two sidebars 33. Two horizontal bars 32
are set in the bottom of the fixed bed board 2. The above upper
frame 3 has one end extending to the head back portion 1 bottom.
The lower frame 4 includes a rectangular frame 41, the intermediate
connecting rod 42, and the first bracket 44 and four short rails
43. The intermediate connecting rod 42 is set inside the
rectangular frame 41. The first bracket 44 is set above the
intermediate connecting rod 42. The four short rails 43 are set
inside two sides of the rectangular frame 41. The upper frame 3 has
four guide mechanisms 33 located within the four short rails 43 of
the lower frame 4. The drive structure further comprises a front
motor bracket 6 and the linear bearing assembly 7.
[0047] The motor bracket 6 includes a rotating lever 61, and two
connecting rods 62 and 63 of the second bracket. Rotation of the
horizontal lever 61 is hinged to the upper frame 3 at one end of
the two sides of the lever 31 between the two connecting rods 62
vertically spaced and disposed on the rotating lever 61. The second
bracket 63 is provided in the bottom surface of the rotating lever
61.
[0048] The linear bearing assembly 7, FIG. 4 includes a bottom edge
member 71, two side edge members 72, two linear bearings 73 and two
base members 74. The two side edges 72 are separately situated upon
two sides of the bottom edge 71. The two linear bearings 73 have
one end spaced vertically from the bottom edge 71. The two base
stands 74 are located at the other end of the two linear bearings
73. The bottom edge 71, two sides of the bottom edge of the base 72
and two bases 74 are located at the back of the head bottom surface
of the headback bedboard 1. During installation, it is preferred
that the bottom surface of the headback bedboard 1 has a smooth
plywood surface that can receive wood screws that pass through
screw openings formed on the bottom edge member 71 and the two side
edge members 72. The bottom edge member 71 can be riveted or welded
to the two side members 72. The base stand 72 is also preferably
screwed to the bottom surface of the headback bedboard 1. The
linear bearings 73 may have a flange with an opening for receiving
hinge connection with the ends of the two connecting rods 62. The
flange of the linear bearings are oriented downward. The linear
bearings are mounted on linear bearing rails that preferably have a
round cross-section. The linear bearing rails are bridged between
the two base stands 74 and the bottom edge 71. The linear bearing
rails can be attached to a vertical portion of the two base stands
74 and to a vertical portion of the bottom edge 71. The bottom edge
member and two side edge members can be made of angle iron such as
slotted angle iron.
[0049] The front motor bracket 6 is a metal frame including two
connecting rods 62 welded to rotating lever 61 which is welded to
the second bracket 63. The front motor bracket 6 has two connecting
rods 62 hinged to the two linear bearings 73 at the upper tips of
the two connecting rods 62. The front motor 5 and the lower frame
4, are hinged at the intermediate connecting rod 42 on the first
bracket 44. The front motor 5 drive rod 51 are hinged to the top of
the front motor bracket 6 rotating lever 61 on the second bracket
63.
[0050] The front motor bracket 6 is welded to second bracket 63
which is a curved bracket that is curved toward the front motor 5
direction. The curved bracket is set so that the front motor
driving the rotating lever has a longer lever arm during
rotatation, so will be able to produce greater torque motor with
smaller power, so that the front motor is sufficient to drive the
rotating lever rotatation.
[0051] On the upper frame 3, the four guide mechanism 33 can be
guide wheels or guide sliders. Various guide mechanisms can provide
good guiding whether they be guide wheels as shown or guide sliders
on the lower frame rails as long as they make the upper frame and
the lower frame active connections more reliable.
[0052] The upper frame 3 two crossbars 32 are secured by means of
screws located at the fixed bedboard bottom surface. The bottom
edge 71 of the linear bearing assembly 7, the two side edges 72 and
the base 74 are connected by screws, respectively provided in a
bottom surface of the head back bedboard. The front motor rotating
lever 61 has a sectional view of the bracket 6 that is rectangular.
A rectangular cross-section of the rotating lever is preferred for
a good rigidity and improving torsional properties of the rotating
lever to avoid the deformation or distortion of the rotating
lever.
[0053] The lower frame 4 rectangular frame 41 has a middle narrow
portion and the intermediate connecting rod 42 is provided on a
rectangular frame 41 and the inner side of the narrow portion. The
rectangular frame 41 preferably has a middle narrow portion that
can have an hourglass shape to provide for an indent near a
person's foot when a person is trying to get on the bed and off the
bed. As the lower frame for the entire electric bed support frame
has a rectangular middle narrow portion, this preferably improves
the rigidity of the lower frame to secure the stability of the
electric bed support while also improving the appearance of the
electric bed.
[0054] Compared to traditional electric beds, the best mode is to
use high quality linear bearings that could allow for a smaller
front motor. This design strategy drive structure aims to be more
reasonably optimized for improving structural stability of each
frame member. The present invention can be a convenient retrofit
for conserving production costs and materials, with reliable
performance and convenient installation and maintenance. This
design trade-off seeks to further improve the overall performance
of the electric bed while effectively reducing the weight of the
entire bed. Gearing the loading movement of the electric bed head
backboard the front motor preferably takes on a more evenly
distributed force. Each frame is also not easily deformed as a user
shifts weight from a left to right side of the bed. The backboard
connection with each framework has a more reliable connection and
is more secure. Having the front motor bracket 6 second bracket 63
connected to a metal connection rod 62 allows force to be more
evenly distributed since it avoids a direct connection between the
metal second bracket and the plywood headback bedboard.
[0055] The front motor fixed points are located at the middle of
the lower frame through its first bracket. The front motor drive
shaft connects the front motor rotating lever through the second
bracket. When the front motor starts to drive, the driving rod
pushes the second bracket which rotates the rotating rod through
the hinge point of the upper frame. Meanwhile, the front motor
support has two rods which drive the two linear bearings of the
linear bearing assembly. Through the linear bearing assembly
connecting to the bottom edge of the head bed board, two side rods
and the two bases then land the head backboard to rotate at the
connection point with the fixed bed board. This also achieves the
rotational rising of the head backboard. When needing to decline
the head backboard to prone position, the front motor can be
rotated in reverse. The drive rod can also pull the rotary rod in
reverse rotation so that the headback bedboard rotation decline is
controlled by a linear bearing assembly.
[0056] Design parameters for super obese users should have the
drive mechanism structure overcome the stress concentration defects
of the traditional front motor drive structure. The front motor
connecting to the rotation of the front motor bracket lever should
provide a certain amount of torque to move the linear bearing
assembly during rotatation while also lifting the headback
bedboard, and improving the motor load conditions to preserve the
life of the front motor, and also make the headback bedboard have
smoother movement in an non jamming manner. The linear bearing
assembly of the headback bedboard should more smoothly lift the
underside of the headback bedboard to smooth out the push and pull
forces on headback bedboard and thus avoid the traditional
structure of the front motor drive rod pushing on the headback
bedboard where the bedboard could be easy to damage.
* * * * *